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953521-640 — PIN,STRAIGHT,HEADLESS

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

953521-640: PIN,STRAIGHT,HEADLESS.

The PIN,STRAIGHT,HEADLESS is a the manufacturer industrial component. Key specifications include material: STEEL COMP 410 OR STEEL COMP 416 OVERALL, surface_finish: 16.0 MICROINCHES OUTSIDE DIAMETER, first_end_style: CHAMFERED, hardness_rating: 36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL, second_end_style: RADIUS, pin_overall_length: 0.615 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5315-01-129-0795, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
953521-640
NSN: 5315-01-129-0795
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 06848 — HONEYWELL INTERNATIONAL INC DIV AEROSPACE-SOUTH BEND (BENDIX DR) (USA)
SPECIFICATIONS
materialSTEEL COMP 410 OR STEEL COMP 416 OVERALL
surface_finish16.0 MICROINCHES OUTSIDE DIAMETER
first_end_styleCHAMFERED
hardness_rating36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL
second_end_styleRADIUS
pin_overall_length0.615 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN
pin_overall_diameter0.1884 INCHES MINIMUM AND 0.1886 INCHES MAXIMUM IN
first_end_taper_angle45.0 DEGREES NOMINAL
first_end_taper_length0.125 INCHES NOMINAL IN
second_end_corner_radius0.0156 INCHES MINIMUM AND 0.0469 INCHES MAXIMUM IN
material_document_and_classification66 FED STD ALL MATERIAL RESPONSES OVERALL
second_end_relationship_with_first_endNOT IDENTICAL
NSN5315-01-129-0795
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 953521-640 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
SURFACE FINISH: 16.0 MICROINCHES OUTSIDE DIAMETER
•
FIRST END TAPER LENGTH: 0.125 INCHES NOMINAL IN
•
FIRST END STYLE: CHAMFERED
•
HARDNESS RATING: 36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD ALL MATERIAL RESPONSES OVERALL
•
FIRST END TAPER ANGLE: 45.0 DEGREES NOMINAL
•
PIN OVERALL DIAMETER: 0.1884 INCHES MINIMUM AND 0.1886 INCHES MAXIMUM IN
•
PIN OVERALL LENGTH: 0.615 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
SURFACE FINISH16.0 MICROINCHES OUTSIDE DIAMETER
FIRST END TAPER LENGTH0.125 INCHES NOMINAL IN
FIRST END STYLECHAMFERED
HARDNESS RATING36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD ALL MATERIAL RESPONSES OVERALL
FIRST END TAPER ANGLE45.0 DEGREES NOMINAL
PIN OVERALL DIAMETER0.1884 INCHES MINIMUM AND 0.1886 INCHES MAXIMUM IN
PIN OVERALL LENGTH0.615 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN
SECOND END RELATIONSHIP WITH FIRST ENDNOT IDENTICAL
SECOND END STYLERADIUS
OTHER ITEMS IN FSC 5315 — Nails, Machine Keys, and Pins
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5315-00-000-1037 5315-00-000-1067 5315-00-000-1245 5315-00-000-1372 5315-00-000-1412 5315-00-001-1571 5315-00-001-1572 5315-00-001-1602
SUBSTITUTES & CROSS-REFERENCES 1
10122998Reference document
Same NSN cross-reference
Reference document — Informative reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 953521-640?
953521-640 is a PIN,STRAIGHT,HEADLESS.
What parts can replace 953521-640?
There is 1 known substitute for 953521-640: 10122998. Substitute compatibility should be verified for your specific system.
What is the NSN for 953521-640?
953521-640 is cataloged in the U.S. Government catalog under NSN 5315-01-129-0795. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.